RC Markdown vs Hyday MD

THE AI WORKFLOW COMPANION Claude, ChatGPT, and other AI assistants produce detailed reports. But when you open them on iPhone, LaTeX math breaks, Mermaid diagrams disappear, and code looks like a mess. RC Markdown handles all of it. A dedicated viewer built to read, render, and share AI-generated documents exactly as intended. DISTRACTION-FREE READING, BUILT FOR LONG DOCUMENTS No toolbars. No editing UI. Just your document, rendered beautifully, ready to read from start to finish. Open a file, read it comfortably, and forward it to your team. RENDERING Complex Math — On-device KaTeX rendering for inline and block LaTeX equations. Technical Diagrams — Mermaid support for flowcharts, sequence diagrams, Gantt charts, and more. Clean Code — Syntax highlighting for 20+ languages including Python, Swift, Rust, and TypeScript. EXPORT AND SHARE Tap Export to convert your document and open the iOS Share Sheet instantly — send via Mail, Messages, Slack, or save to Files. PDF — Vector-based, text-selectable, always cleanly formatted. PNG — Full-document image, ready to paste into any chat or deck. HTML — Self-contained file with all styles and diagrams embedded. DESIGNED FOR iOS Table of Contents — Auto-generated from headings. Tap to jump, drag the panel anywhere on screen. In-Document Search — Real-time highlighting with match-by-match navigation. Dark Mode — Light, Dark, or System. Optimized for OLED displays. Available in 10 languages — English, German, French, Spanish, Portuguese, Russian, Japanese, Korean, Simplified and Traditional Chinese. iPhone and iPad — Optimized for both. PRIVATE AND OFFLINE No accounts. No sign-in. No internet required. Every feature works completely offline. No data ever leaves your device.

Hyday MD is a Markdown tool built for reading. Originally designed as the mobile reader for the Hyday note-taking app, it lets you comfortably read notes stored in iCloud Drive on your iPhone and iPad. It is also a general-purpose lightweight Markdown reader — any .md file written with other tools displays just fine. DESIGN PRINCIPLES • Hands off your syntax — your files stay untouched • Content first — the UI stays quietly in the background • Typography is the design — hierarchy through type and whitespace, not decoration FEATURES • Frontmatter parsing: title, type, tags, createdAt, and lastModified extracted and displayed automatically • Wiki links: [[note name]] jumps straight to the linked note; the back button returns to the previous one • Mermaid diagrams: flowcharts, sequence diagrams, and more rendered inline, with full-screen viewing • Reading font size: four levels (S / M / L / XL), independent of the system setting • Edit and write back: tap edit, make changes, save — lastModified updates in your local time zone • LaTeX math: inline and block syntax both supported • Code blocks: syntax highlighting, language labels, one-tap copy • Tables: GFM alignment syntax supported • Task lists: GFM checkboxes rendered in brand colors • Local images: paths resolved relative to the .md file • hyday-asset custom scheme: maps to the assets/ folder at the vault root • Hyday life log marks: start, end, now, idea, important — five states told apart by color • Subfolder browsing: only folders containing Markdown are shown, keeping lists clean • Recent files: jump back to your last-read note straight from the home screen • Recent folders: persisted with iOS security-scoped bookmarks — no re-picking after relaunch • Bundled fonts: Fira Sans Condensed and Fira Code, fully rendered even offline PRIVACY • No user data collected • No analytics, no tracking • No network requests (unless your files reference web images) • Recent files and folders lists live only on your device GOOD FOR • Writers, engineers, and researchers who keep Markdown notes • Hyday note app users • Anyone who reads technical docs, lecture notes, or study notes on their phone NOT FOR • Rich-text (WYSIWYG) editing • Team collaboration or cloud version control • Reading PDF, Word, or other formats